This eModule presents real-world problems that motivate students to work with right triangle geometry. Interactive worksheets and diagrams with feedback help students learn to solve for unknown angles...More: lessons, discussions, ratings, reviews,...

GeoCon HD is designed to be used by students, teachers and math enthusiasts studying plane geometry. With GeoCon HD various constructions can be created with the touch of a finger. Resolve constructio...More: lessons, discussions, ratings, reviews,...

GeoCon is designed to be used by students, teachers and math enthusiasts studying plane geometry. With GeoCon various constructions can be created with the touch of a finger. Resolve construction task...More: lessons, discussions, ratings, reviews,...

Introduction
You know how to find the length of the third side of a right triangle when the lengths of the two other sides were given, but how does a person determine the length of a side if t...More: lessons, discussions, ratings, reviews,...

Discover how the Pythagorean formula describes the relationships between the lengths of the legs and hypotenuse of a right triangle. Teachers and students can use this audio-narrated lesson, interact...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that demonstrates a graphical proof of Pythagoras' Theorem.
The applet shows a right triangle that is replicated and then moved around to demonstra...More: lessons, discussions, ratings, reviews,...

Students do a visual demonstration of the Pythagorean theorem based on Euclid’s proof. By shearing the squares on the sides of a right triangle, they create congruent shapes without changing...More: lessons, discussions, ratings, reviews,...

This book guides students through a variety of proofs and applications of the Pythagorean theorem. By constructing and dynamically manipulating figures, students visualize the theorem and gain insight...More: lessons, discussions, ratings, reviews,...

Students use reflection and rotation to build a sketch that demonstrates a famous proof by Leonardo. The link to the activity itself is to a zip file that contains both the activity in pdf format ...More: lessons, discussions, ratings, reviews,...

Students create a sketch in which a dramatic animation shows how the sum of the areas of two squares is equal to the area of the third square. The link to the activity itself is to a zip file tha...More: lessons, discussions, ratings, reviews,...

Students create both a visual and formal proof of the Pythagorean theorem, as well as view four additional geometric demonstrations of the theorem. These demonstrations are based on proofs by Bhaskara...More: lessons, discussions, ratings, reviews,...

In a beach race, contestants must swim to a point along the beach and then run to reach the ﬁnish line. Where should I aim to land on the beach so as to minimize my total time for the race? Stu...More: lessons, discussions, ratings, reviews,...

This material is based upon work supported by the
National Science Foundation under Grant DUE-0226284.
Any opinions, findings, and conclusions or recommendations
expressed in this material are those of the author(s)
and do not necessarily reflect the views of the
National Science Foundation.